The result of an attempt to build an insane robot, Roberto views himself as a failure - this article may prove otherwise. Roberto's a career criminal, robbing banks with his trusted stabbing knife. His interests include, robbing, stabbing, and speaking in scary, frantic voices. An old friend of Bender's, Roberto implicates Fry and Bender in a bank heist with himself when he runs into them mid-heist, and lands them all in a robot insane asylum. Never afraid to kill, take hostages, and stab in the general direction of others, he's shown questionable decision making, re-robbing the same banks two and three times after his initial pilferings.

Potentially abused as a robot child, he is capable of killing a man with a sock. As you may have concluded, Roberto is probably no more insane than the rest of us, and is likely just misunderstood (except he believes he has a hotel in his foot). He was murdered and had his brain transplanted into Mecha Hermes, a walking killing machine, before being melted by a byproduct of LeBarbara's cooking. He is currently deceased, though that could change.